Using a smaller rifle primer in pistol ammunition is generally not advised. Here are several vital details to contemplate: ### Distinctions in Style and design one. *Primer Composition*: Smaller rifle primers commonly Use a more challenging cup than smaller pistol primers, intended to resist increased pressures affiliated with rifle cartridges. https://winchestersmallrifleprime64074.ampedpages.com/employing-a-little-rifle-primer-in-pistol-ammunition-is-generally-not-recommended-58595334